Swiss Travel Pass & Family Card - child prices

We are planing to purchase Swiss Travel Pass. we noted that Children upto age 16 years travel along for free. we understand that only 'adult' has to purchase extra discounted tickets (whenever applicable upto 50% discount) .

My query is "whether children travel is absolutely free across all modes of travel including cogwheel in Jungfraujoch, cable car in Mt. Titnis / Pilatus'?